I have a 1983 Remington 870 Wingmaster Magnum with the 30 inch Full Choke 3 inch magnum Vent Rib Barrel. Is that barrel compatible, recommended, etc. for todays non-toxic shot? I also have a 28 inch RemChoke barrel 2-3/4 and 3" Magnum Vent Rib barrel that I use for most hunting. I have never hunted waterfowl of any kind in my life but I may get around to it one of these days.
The Remington Wingmaster fixed full choke barrels are fine for standard velocity Steel shot up to #2 steel. 1 1/8oz 1550fps or 1 1/4oz 1425fps will work. Any Bismuth load up to BB is safe. Before Remington came out with Hypersteel they published the #2 steel certification for many year.